// ConsoleTools
// Copyright (C) 2017-2024 Dust in the Wind
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

using System;
using System.ComponentModel;
using DustInTheWind.ConsoleTools.Controls;
using DustInTheWind.ConsoleTools.Controls.Spinners;
using DustInTheWind.ConsoleTools.Demo.NetCore.ProgressBarDemo.BusinessLayer;

namespace DustInTheWind.ConsoleTools.Demo.NetCore.ProgressBarDemo.PresentationLayer;

/// <summary>
/// This view uses a <see cref="DataProcessingJob"/> to simulate some business process and a <see cref="ProgressBar"/> control
/// to display its percentage progress.
/// </summary>
internal class DataProcessingView
{
    private static ProgressBar progressBar;
    private static DataProcessingJob job;

    public DataProcessingView()
    {
        progressBar = new ProgressBar();
    }

    public void Show()
    {
        TextBlock textBlock = new()
        {
            Margin = "0 0 0 1",
            Text = "We create a DataProcessingJob object that will simulate some data processing."
        };
        textBlock.Display();

        job = new DataProcessingJob();
        job.StateChanged += HandleJobStateChanged;
        job.ProgressChanged += HandleJobProgressChanged;

        job.Run();
    }

    private static void HandleJobStateChanged(object sender, EventArgs e)
    {
        DataProcessingJob job = sender as DataProcessingJob;

        if (job == null)
            return;

        switch (job.State)
        {
            case JobState.Running:
                TextBlock textBlockStart = new()
                {
                    Margin = "0 0 0 1",
                    Text = "The job was started."
                };
                textBlockStart.Display();
                progressBar.Display();
                break;

            case JobState.Stopped:
                progressBar.Close();
                TextBlock textBlockFinish = new()
                {
                    Margin = "0 1 0 0",
                    Text = "The job was finished."
                };
                textBlockFinish.Display();
                break;
        }
    }

    private static void HandleJobProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        progressBar.Value = e.ProgressPercentage;
    }
}